[libxml2] Fix dlopen check

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 2d164d683599763c68fab1b7150cde7e6d8b330e
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Sun Sep 4 02:54:20 2022 +0200

    Fix dlopen check

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index 1e9ff166..84897839 100644
--- a/configure.ac
+++ b/configure.ac
@@ -872,7 +872,7 @@ if test "$with_modules" != "no" ; then
         _libs=$LIBS
         AC_SEARCH_LIBS([dlopen], [dl], [
             WITH_MODULES=1
-            if test "$ac_cv_search_iconv" != "none required"; then
+            if test "$ac_cv_search_dlopen" != "none required"; then
                 MODULE_PLATFORM_LIBS=$ac_cv_search_dlopen
             fi
             AC_DEFINE([HAVE_DLOPEN], [], [Have dlopen based dso])], [